IMPROVED TIME-OF-FLIGHT MR ANGIOGRAPHY OF THE BRAIN WITH MAGNETIZATION TRANSFER CONTRAST

被引：162

作者：

EDELMAN, RR ^{[1
]}

AHN, SS ^{[1
]}

CHIEN, D ^{[1
]}

WEI, L ^{[1
]}

GOLDMANN, A ^{[1
]}

MANTELLO, M ^{[1
]}

KRAMER, J ^{[1
]}

KLEEFIELD, J ^{[1
]}

机构：

[1] HARVARD UNIV,SCH MED,BOSTON,MA 02115

来源：

RADIOLOGY | 1992年 / 184卷 / 02期

关键词：

BLOOD VESSELS; MR; BRAIN; CEREBRAL BLOOD VESSELS; MAGNETIC RESONANCE (MR); CONTRAST ENHANCEMENT; MAGNETIZATION TRANSFER CONTRAST; VASCULAR STUDIES;

D O I：

10.1148/radiology.184.2.1620835

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

The authors hypothesized that magnetization transfer contrast (MTC) could be used to improve flow contrast in time-of-flight (TOF) magnetic resonance (MR) angiography. Two- and three-dimensional flow-compensated gradient-echo images were obtained with and without MTC. MTC images were obtained by applying low-power radio-frequency (RF) radiation with a frequency offset from the bulk "free" water resonance frequency before the excitation RF pulse. The signal intensity of stationary tissue decreased as the power applied for the MTC pulse was increased. A smaller decrease occurred in venous signal intensity as measured in the superior sagittal sinus, and less change was seen in the arterial signal intensity as measured in the middle cerebral artery. Cerebrospinal fluid showed no MTC effect. The use of MTC improved small-vessel depiction on maximum-intensity projection images. The authors conclude that use of MTC can substantially enhance the quality of TOF MR angiography of the brain.

引用

页码：395 / 399

页数：5

共 10 条

[1] ARTIFACTS IN MAXIMUM-INTENSITY-PROJECTION DISPLAY OF MR ANGIOGRAMS [J].